Introduction

The 1999-2004 Jeep Grand Cherokee has a common failure where the blower fan wire adapter overheats and melts. Use this guide to fix and repair this connector and get your AC and Heater working again!

Place the car in park, activate the parking break, and leave the car running.
  • Place the car in park, activate the parking break, and leave the car running.

  • The blower motor is located under the dash on the passenger side of the vehicle. Push the seat back, and place your tools on the floor of the car.

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There are a few wires hanging below the passenger side dash.
  • There are a few wires hanging below the passenger side dash.

  • The blower motor adapter is a bundle of three wires located on the left side.

  • While the car is on push and pull gently on the wire connection.

  • If the fan turns on you have identified the problem and we will fix it.

    • If the fan does not turn on the damage may not be fixable without purchasing new parts.

  • Do not grasp any wires you can not see. Do not grasp any wires that are not covered in insulation and or electrical tape.

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  • Turn off the car.

  • There are two screws holding the adapter in place. Using a philips screw driver, remove both screws and the adapter will come down.

  • The two screws are identical. Be careful not to lose them.

  • Be sure the car is completely off before unscrewing anything.

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  • The connection between the three wires and the adapter box is the location of the common melting default.

  • Observe the damage and decide if electrical tape will be enough to hold the wires in place.

  • Replacement parts are available for purchase if the damage is beyond repair.

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  • Using electrical tape wrap the wires tightly until there are securely in place.

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  • Screw the adapter back into place.

  • Turn on the car and test the AC/Heater

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Conclusion

Enjoy your working AC and Heater!

4 other people completed this guide.

William Schaller

Member since: 02/24/2015

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Cal Poly, Team 24-1, Green Winter 2015 Member of Cal Poly, Team 24-1, Green Winter 2015

CPSU-GREEN-W15S24G1

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3 Comments

radical, thank you for this!

cgerdes714 - Reply

Very good job - thanks for the info

I own one WJ 4.0 m1999

The ac doesn’t turn on(no lights)

Is this loose wire connection responsible for this?

ANGELO - Reply

good job thanks

rad8253 - Reply

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